- A Nice Compliment(http://www.cstutoringcenter.com/cryptography/problems.php?id=4) - Being a tourist (http://www.cstutoringcenter.com/cryptography/problems.php?id=5)

Hex_to_Ascii.cpp

#include <iostream>
#include <stdio.h>
#include <string.h>
#include <string>
#include <sstream>

using namespace std;

int main()
{
  string str= "";	
	char input1,input2, ans[1], ans_str[20];
	int output;
	stringstream stream1, stream2;
	int count=0;
	cout << "Input Hex Value => Output Ascii Value (Result => input 0)" << endl;
	do {
		
		//stringstream 사용 시 초기화를 해야 재사용 가능 
		stream1.clear();
		
		cout << "Input Hex Value : " ;		
		cin >> str;
		
		//cout << "Your Input Value is " << str << endl;
		stream1 << str;
		
		//초기화를 안한 경우 1회만 정상작동하여 stream 값이 0으로 출력되는 것을 확인 
		//cout << "Your Input Value is " << stream << endl;
		
		stream1 >> hex >> output ;
		//cout << "Your Decimal Value is " << output << endl;
		sprintf(ans,"%c",output);
		
		if (count == 0)	{
			strcpy(ans_str,"");
			strcat(ans_str, ans);
		} else strcat(ans_str, ans);
		
		//printf ("Your Output is %c\n", output);		
		count++;			
				
	} while (output!=0);
	// 0을 입력시 프로그램이 종료가 되면서  한 번에 답을 출력해 준다. 
	cout << "Bye" << endl;
	cout << "Answer is " << ans_str << endl;
	
	return 0;
}